Compared to canvas, this looks more like a early 2010s style transfer tech demo :) Thanks for the link though!

Ah, that's kind of reassuring for canvas, because I was really disappointed when I' tried to play a bit with it. I was like: “meh, how is that even worth a press release?”

Whoa. Not just all non-Windows users but browser based. That's neat. I was interested in trying it out but didn't want to download the software.

After painting for 5 minutes: This segmentation map may contain unsupported labels.

Looks like it has CORS issue.

It works for me. (FF Linux)